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A031130 Number of proper factorizations of p1^n*p2^7, where p1 and p2 are distinct primes. 1
14, 44, 117, 256, 521, 974, 1751, 2997, 4986, 8042, 12692, 19583, 29718, 44323, 65209, 94641, 135804, 192698, 270821, 377047, 520623, 713122, 969783, 1309645, 1757446, 2343930, 3108552, 4100219 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,1
LINKS
FORMULA
a(n) = A002756(n) - 1 = A028422(2^n*3^7). - Ray Chandler, May 01 2017
CROSSREFS
Sequence in context: A033587 A189807 A009942 * A215199 A216258 A064348
KEYWORD
nonn
AUTHOR
EXTENSIONS
Offset changed to 0 and more terms added by Ray Chandler, May 01 2017
STATUS
approved

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Last modified April 21 00:22 EDT 2024. Contains 371850 sequences. (Running on oeis4.)